.container {
    width: 1200px;
    min-width: 1200px;
    margin: 0 auto;
}

.fontSize36 {
    font-size: 36px;
}

/*定义滚动条高宽及背景 高宽分别对应横竖滚动条的尺寸*/
::-webkit-scrollbar {
    width: 6px;
    height: 16px;
    background-color: #F5F5F5;
}

/*定义滚动条轨道 内阴影+圆角*/
::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    background-color: #F5F5F5;
}

/*定义滑块 内阴影+圆角*/
::-webkit-scrollbar-thumb {
    border-radius: 10px;
    -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, .3);
    background-color: #999;
}

/******************** 头部 ********************/
.header {
    width: 100%;
    height: 417px;
    color: #fff;
    background: url(../images/bg.jpg) no-repeat center -120px;
}

.nav {
    height: 68px;
    background-color: rgba(0, 0, 0, 0.5);
}

.nav .container {
    position: relative;
}

.nav_left {
    font-size: 24px;
    padding: 15px 0;
    cursor: pointer;
    position: absolute;
    left: 0;
}

.nav .container img {
    width: 30px;
}

.nav_right {
    padding: 5px 0;
    position: absolute;
    right: 0;
}

/* .nav_right::after {
    clear: both;
    content: "";
    width: 0;
    height: 0;
    display: block;
    visibility: hidden;
} */

.nav_right li {
    color: #fff;
    font-size: 18px;
    float: left;
    margin-left: 4px;
    cursor: pointer;
}

.nav_right .li {
    padding: 15px;
}

.nav_right li button {
    margin: 10px 0 0 15px;
    padding: 7px;
    color: #fff;
    font-size: 18px;
    background-color: #999;
    border-radius: 4px;
    position: relative;
}

.nav_right .li:hover {
    border-bottom: #fff 3px solid;
}

.nav_right .li:active {
    color: rgb(37, 153, 238);
}

.nav_right li button:hover {
    background-color: rgb(37, 153, 238);
}

.nav_right li button:active {
    top: 2px;
}

.nav_active {
    border-bottom: #fff 3px solid;
}

.header_text {
    text-align: center;
    font-size: 48px;
    margin-top: 120px;
}

/******************** 内容 ********************/
/* .section1 {
    background-color: pink;
} */

.section1 {
    padding: 70px 50px 0 50px;
}

.section2 {
    padding: 70px 50px 70px 50px;
}

.section1_text {
    position: relative;
}

/* .section1_text::after {
    clear: both;
    content: "";
    width: 0;
    height: 0;
    display: block;
    visibility: hidden;
} */

.section1 .fontSize36 {
    margin-bottom: 40px;
}

.section1_text p {
    font-size: 24px;
    margin-bottom: 17px;
}

.section1_text li {
    float: left;
    margin-right: 33px;
}

.section1_text:last-child {
    margin-right: -33px;
}

.section1_text li img {
    width: 250px;
    height: 190px;
}

/* .section2 {
    background-color: antiquewhite;
} */

.section2 .fontSize36 {
    text-align: center;
}

.tabBox {
    position: relative;
    margin-bottom: 25px;
}

.section2 .tab {
    float: right;
    font-size: 18px;
}

.section2 .tab li {
    float: left;
    padding: 20px;
    color: #999;
    border-bottom: #999 2px solid;
    cursor: pointer;
}

.section2 .tab li:hover {
    font-weight: 550;
    color: #000;
    border-bottom: #000 4px solid;
}

.section2 .tab li:active {
    color: rgb(37, 153, 238);
    border-bottom: rgb(37, 153, 238) 4px solid;
}

.tab_active {
    font-weight: 550 !important;
    color: #000 !important;
    border-bottom: #000 4px solid !important;
}

.section2 .lesson li {
    margin-bottom: 45px;
}

.section2 .lesson li img {
    width: 150px;
    height: 150px;
    display: inline-block;
    border-radius: 50%;
}

.lesson_right {
    width: 85%;
    height: 150px;
    float: right;
}

.lesson_right .lesson_name {
    font-size: 26px;
    margin-bottom: 15px;
}

.lesson_right p {
    font-size: 18px;
    margin-bottom: 15px;
}

.lesson_right .tab_name {
    display: inline-block;
    height: 20px;
    line-height: 20px;
    padding: 0 15px;
    color: #fff;
    border-radius: 10px;
    cursor: pointer;
}

.tab_HTML {
    background-color: rgb(166, 187, 250);
}

.tab_CSS {
    background-color: rgb(60, 118, 59);
}

.tab_JavaScript {
    background-color: rgb(36, 69, 102);
}

/******************** 报名 ********************/
.enrollBox {
    margin-top: -50px;
}

.enroll {
    width: 980px;
    margin: 0 auto;
    padding: 30px 40px;
    background-color: #fff;
    border-radius: 20px;
    box-shadow: 0 0 10px 1px rgb(134, 134, 134);
    position: relative;
}

.enroll>ul>li {
    font-size: 20px;
    float: left;
    margin-right: 20px;
}

.enrollbox {
    display: block;
    margin-top: 15px;
    height: 60px;
    font-size: 18px;
    background-color: rgb(238, 238, 238);
    border-radius: 10px;
    border: rgb(238, 238, 238) 2px solid;
    text-align: center;
    line-height: 60px;
    cursor: pointer;
}

.school {
    width: 220px;
}

.sth_active {
    border-radius: 10px 10px 0px 0px;
    border-bottom-color: #fff;
    background-color: #fff;
}

.year {
    width: 160px;
}

.email {
    width: 260px;
}

/* 1.选择您的学校 */
.schoolBox {
    position: absolute;
    padding: 18px;
    background-color: #fff;
    width: 580px;
    font-size: 18px;
    color: #999;
    z-index: 1;
    border-radius: 0px 10px 10px 10px;
    box-shadow: 0px 0px 0px 0px rgb(134, 134, 134), 0px 0px 0px 0px rgb(134, 134, 134), 0px 0px 0px 0px rgb(134, 134, 134), 0px 1px 1px 0px rgb(134, 134, 134);
}

.schoolBox li {
    cursor: pointer;
}

.schoolBox li:hover {
    font-weight: 550;
    color: #000;
}

.sthBoxLi_active {
    font-weight: 550;
    color: #000;
}

.schoolBox_tab {
    height: 300px;
    float: left;
    border-right: rgb(238, 238, 238) 2px solid;
    overflow-y: hidden;
    overflow-x: hidden;
}

.schoolBox_tab:hover {
    overflow: auto;
}

.schoolBox_container {
    margin-right: 5px;
    height: 300px;
    position: absolute;
    left: 116px;
    overflow-y: hidden;
    overflow-x: hidden;
}

.schoolBox_container:hover {
    overflow: auto;
}

.schoolBox_tab ul li {
    text-align: center;
    padding-right: 18px;
    height: 50px;
    width: 96px;
    line-height: 50px;
}

.schoolBox_container ul li {
    float: left;
    width: 225px;
    height: 50px;
    text-align: center;
    line-height: 50px;
}

/* 2.选择您入学年份 */
.yearBox {
    position: absolute;
    padding: 15px 25px;
    background-color: #fff;
    width: 400px;
    font-size: 18px;
    color: #999;
    z-index: 1;
    border-radius: 0px 10px 10px 10px;
    box-shadow: 0px 0px 0px 0px rgb(134, 134, 134), 0px 0px 0px 0px rgb(134, 134, 134), 0px 0px 0px 0px rgb(134, 134, 134), 0px 1px 1px 0px rgb(134, 134, 134);
}

.enroll .yearBox li {
    float: left;
    width: 87.5px;
    height: 54px;
    line-height: 54px;
    text-align: center;
    cursor: pointer;
}

.enroll .yearBox li:hover {
    font-weight: 550;
    color: #000;
}

/* 3.输入您的电子邮箱 */

/* 4.报名 */
.enroll ul li button {
    position: relative;
    margin-right: -20px;
    margin-top: 45px;
    height: 60px;
    width: 180px;
    line-height: 60px;
    text-align: center;
    color: #fff;
    font-size: 20px;
    background-color: rgb(37, 153, 238);
    border-radius: 40px;
}

.enroll ul li button:hover {
    /* text-shadow:2px 2px 1px rgb(134, 134, 134); */
    box-shadow: 0 0 5px 1px rgb(134, 134, 134);
}

.enroll ul li button:active {
    top: 2px;
}

/* 5.信息提示 */
.message {
    width: 980px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    margin: 15px auto 0;
    color: #000;
    font-size: 18px;
}

.error {
    margin-top: 15px;
    width: 100%;
    height: 100%;
    background-color: rgb(255, 150, 154);
    border-radius: 20px;
}

.pass {
    margin-top: 15px;
    width: 100%;
    height: 100%;
    background-color: rgb(168, 254, 138);
    border-radius: 20px;
}

.passText {
    font-size: 38px;
    text-align: center;
}

.enrollAgain {
    position: absolute;
    right: 20px;
    bottom: 10px;
    color: #999;
    cursor: pointer;
}

.enrollAgain:hover {
    color: #000;
}

.enrollAgain:active {
    bottom: 8px;
}

/******************** 底部 ********************/
.footer {
    background-color: rgb(221, 221, 221);
}


.footer .container {
    padding: 50px 50px;
    position: relative;
}

.circle {
    position: absolute;
    top: 50%;
    margin-top: -25px;
}

.circle div {
    width: 50px;
    height: 50px;
    font-size: 26px;
    text-align: center;
    line-height: 50px;
    color: #fff;
    display: inline-block;
    background-color: rgb(52, 52, 52);
    border-radius: 50%;
    margin-right: 30px;
}

.links {
    float: right;
}

/* .footer .container::after {
    clear: both;
    content: "";
    width: 0;
    height: 0;
    display: block;
    visibility: hidden;
} */

.links div {
    display: inline-block;
    margin-left: 80px;
}

.links div ul {
    margin-top: 30px;
}

.links div ul li {
    margin-bottom: 12px;
}

.links div ul li a {
    color: #000;
}

.links div ul li a:hover {
    color: #fff;
}

.links div ul:last-child {
    margin-bottom: -12px;
}